Electric metal gathering machine



ELECTRIC METAL GATHERING MACHINE Original Filed Nov. 18, 1927 8 Sheets-Sheet 1 Dec. 25, 1934. w H sPlRE 1385,8013

ELECTRIC METAL GATHERING MACHINE Original Filed Nov. 18, 1927 8 Sheets-Sheet 2 Dec. 25, 1934. w, sP|RE 1,985,803

ELECTRIC METAL GATHERING MACHINE Original Filed Nov. 18, 1927 8 Sheets-Sheet 5 Dec. 25, 1934. w H, s RE 1,985,803

ELECTRIC METAL GATHERING MACHINE Original Filed Nov. 18, 1927 8 Sheets-Sheet 4 yd-1% Ev aw Dec. 25, 1934. w s E 1,985,803

ELECTRIC METAL GATHERING MACHINE Original Filed Nov. 18, 1927 8 Sheets-Sheet 5 OOOOOO ll 1- 56a V ,7 V

VE' 1:15 Midway/76' zk e 1934- w. H. SPIRE ELECTRIC METAL GATHERING MACHINE Original Filed Nov. 18. 1927 8 Sheets-Sheet 6 Dec. 25, 1934. w. H, SPIRE 1,985,803

ELECTRIC METAL GATHERING MACHINE Original Filed Nov, 18. 1'92? 8 Sheets-Sheet 7 K ilg/z g ll/Ill iiiiiiiiii lF LVEEIiiILR Dec. 25, 1934. w. H. sPlRE 1,985,803

ELECTRIC METAL GATHERING MACHINE Original Filed Nov. 18, 1927 8 Sheets-Sheet 8 Patented Dec. 25, 1934 UNITED STATES PATENT OFFICE Thompson Products- Ohio Inc., a corporation of Application November 18, 1927, Serial No. 234,159 Renewed September 27, 1930 65 Claims.

poppet valves for internal combustion engines.

It is an object of this invention to provide an improved automatic machine which performs all *the operations, an operator being required only to place and remove the article and to close a switch to start the machine. I am aware that the electric resistance method of heating and upsetting a rod to form an enlarged head has been practiced heretofore, but to the best of my knowledge, prior devices have depended largely on the skill of the operator because each step in the process had to be started by manual adjustments and controls so that therate of output and uniformity of product depended on the skill of the operator. I accomplish the objects of my invention by an electrical system of control embodying a manually operated switch which initiates a sequence of operations including closing a heating circuit through a transformer with a magnetic time delay relay closing a motor circuit after a predetermined time interval sufllcient to initially heat the work to a forging temperature. The motor then operates an abutment which feeds the rod forward to form the enlargement, a stop contact and limit or over-running brake reversing the motor to return the abutment to its, initial position ready for a subsequent repetition of the cycle of operations.

It is also an object of this invention to provide in a machine of the class described means for automatically vary ng the operation thereof according to the plasticity of the heated material, whereby the proper upsetting temperature will be maintained, resulting in the production of uniformly upset blanks.

Other and further important objects of this invention will be apparent from the disclosures in the drawings and specification.

This invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

n the drawings:

Figured is a front elevation, from the operator's position, of a machine embodying the features of this invention.

Figure 2 is a left side elevation of Figure 1.

F'gure 3 is a top plan view thereof.

Figure 4 is an enlarged section on the line IV- IV of Figure 3.

Figure 5 is a fragmentary enlarged detail elevation of the stationary electrode abutment,

Figure 6 is an enlarged fragmentary section on the line VI-VI of Figure 5.

Figure 7 is a section on the line VIIVII of Figure 6.

Figure 8 is a section on the line VIIL-VIH of Figure 6.

Figure 9 is a section on Figure 8.

Figure 10 is a fragmentary detafl elevation of the rod feeding abutment.

Figure 11 is a section on the line XII-XI of Figure 10.

Figure 12 is a section on the line XII-XII of Figure 1 showing the driving connections for the rod feeding mechanism.

Figure 13 is an enlarged section of the motor brake taken on the line XIII-XIII of Figure 12.

Figure 14 is an enlarged section on the line XIV-XIV of Figure 12.

Figure 15 is a section through the control panel box taken on the line XVXV of Figure 1.

Figure 16 is a wiring diagram of the circuit employed.

Figure 17 is a side elevation of the magnetic delay switch which provides a time lag in the start of the feeding mechanism.

Figure 18 is a top view of Figure 17.

As shown on the drawings:

The operating mechanlsmof this invention is supported at a convenient height by means of standards 20, upward extensions 21 of the rear standards serving to support a switchboard box 22 within which is mounted an insulated panel 23 hinged at the bottom and clamped by a thumb screw 24, a pair of pivoted links 25 being provided to hold the panel when released from the screw and swung downwardly.

The standards 20 support a suitable table 26 on which is mounted a bed 2'? for the machine proper. The bed 27 carries end standards 28 and 29 and an intermediate standard 30 which is com nected to the right hand standard 29 by rods 31 forming a guideway, for a sliding carriage 32. The three standards are linked at the top by a fixed member 33 and slideways 34 are formed on this member and on the bed 27 to the left of the intermediate standard for an adjustable sliding block 35 which has an electrode block 38 mounted therein but completely insulated therefrom by insulation 3'1.

The movement of the sliding block 35 towards the right is limited by a stud 38 having adjustable nuts 39 thereon which bear against the side of a lever 40 having an elongated hole 41 for the stud. this lever being interposed between the the line rx-rx of nuts 39 and the standard 28 and having an inserted tooth 42 which engages in notches 43 out in the stud, this structure being provided to hold the block in retracted position when actuated by a counter clock-wise movement of the lever 40 under the influence of a spring 102. The retraction or movement of the block 35 towards the left is limited by hollow studs 44 carried by the standard 26, these studs having a plunger 45 slidable therein which is backed up by a spring 46 which urges the sliding block to the right.

A thick block of insulation 47 is positioned between the electrode block 36 and the intermediate standard 30 to form a spacer when the former is in its extreme right position to prevent contact between the members mentioned because the standard 30 forms part of the opposite terminal of the electrode circuit. The standard 30 supports a two part or divided electrode, the lower part 48 of which is boltedto the standard while the upper part 49 is hinged thereto to swing upwardly. The adjacent inner faces of the two parts of the electrode are formed as replaceable jaws 50 having aligned grooves conforming to the size of the rod 51 which is to be pushed therethrough as will be hereinafter explained. The upper part 49 of the electrode is operated by a spring link 52 and lever 53 shown in Figure 7, the spring link exerting a definite force on the rod 51 sufficient to maintain electrical contact therewith but designed to permit the rod to slide between the electrode halves. The lever 53 and link 52 are so pivoted as to be self-locking when in the position shown in Figure 5 as the pivot 54 between the lever and the link passes slightly beyond a line through the lever pivot 55 and the link pivot 56.

The rod 51 when positioned in the jaws of the two part electrode is aligned with a rod 57 made of an alloy which is relatively hard but which has a high coeflicient of electrical conductivity and which is adjustably mounted in the rear part of the sliding electrode block 36, the front part of the block being vertically split along the axis of the block, the outer part 58 being bolted in place. The adjustable rod 5'7 is intended to project slightly into the cavity in a concave upsetting die 59 so that the rod 51 which is to be upset first contacts the end of the rod 57. After that portion of the rod 51v between the two electrodes becomes sufficiently heated to be plastic, it is fed through the jaws of the two part electrode, being upset and centered in the die 59 during the upsetting operation by the central rod 57 which does not reach a plastic state because of the large volume of metal in the movable electrode and because of water jacketing at 57c. Heat is retained in the die 59 which is constructed of high heat resisting material and is backed by an asbestos pad 59a.

The rod 51 is pushed through the jaws 50 of the two part electrode by means of a boss 60 on the carriage 32, this boss having a small depression 61 on its face to center the rod 51 and to prevent slipping thereof should the rod 51 be sprung. The carriage is advanced by a screw shaft 62 engaging a ribbed nut 62a mounted in the carriage, the shaft being journaled in the standards 29 and 30 and operated by an electric motor 63 through the train of reduction gears 64 shown at the right of Figure 12.

The left end of the motor shaft is provided with a brake mechanism comprising a stationary housing 65 with a cover 66 surrounding a clutch disc 6'7 keyed to the motor shaft. Fabric rac g 6 i secured to the cover 66 and to a disc 69 free to revolve in the housing, this disc having one-way ratchet teeth 70 formed on its hub 71 which is bolted to the disc 69; these teeth being engaged by similar teeth 72 on a member 73 keyed to a stub shaft '74; the member '73 having a thrust ball bearing 76 between it and the end wall 77 of the housing 65 through which the stub shaft projects. The outer end of the stub shaft carries a pair of opposed ratchet wheels 79 keyed thereto between the bifurcated ends 80 of a. lever 81, the whole being held in place by a cover 82 bolted to the housing 65. The lever 81 carries a dog 83 engaging the outer ratchet '79 and backed up by a spring 84, this dog operating the brake when the lever is swung to the left in Figure 14 by a spring 81 as shown in Figure 4. The clutch or brake is operated by means of the lever 81 which angularly displaces the ratchet teeth 70 and 72, thus forcing the disc 69 inwardly to clamp the clutch disc against the stationary housing cover 66.

A second dog 85 engages the second oppositely directed ratchet, there being no motion of either dog unless the lever 81 swings past its normal extreme left position when a pin 86 lifts the camlike extension 87 of the second dog 85 and holds it out of engagement until the lever returns to its normal extreme left position, thus permitting the first dog 83 to take up one or more teeth of the outer ratchet if the brake facings wear sufficiently to allow too much movement of the lever 81. The lever 81 is adjustably pinned to a link 88 which connects through a bell crank 89 and rod 90 to the core 91 of a solenoid 92 connected in the common conductor 141 of the motor circuit. Limit switches 93 are provided which are contacted by the carriage 32, should the latter overrun the normal control switch 95 in either direction, these limit switches opening the motor circuit. The switch 95 when open permits the motor to drive ahead, while when closed it reverses, the motor circuit. This switch is diagrammatically shown in the wiring diagram of Figure 16 and is operated by means of the rod 96 mounted above and parallel to the carriage movement, an upstanding boss 97 on the carriage engaging adjustable stops 98 and 99 on the rod at either limit of its reciprocating motion to move the rod sufflciently to close the stop or reverse switch 95.

The underside of the carriage acts on a lever 100 on a shaft 101 beneath the bed 2'1, this shaft operating a lever 102 at the left standard 28. The lever 102 actuates the lever 40 on the stud 38, thus releasing the movable electrode which was held retracted by the engagement of the lever with the stud while the work is being removed and the carriage returned to its starting position. A transformer 103 has its secondary terminals 104 and 105 connected respectively to the movable electrode 35 and the two part electrode 48 and 49. the terminal connection 104 comprising layers of flexible sheet copper in order to permit the desired range of movement.

The balance if the wiring circuit is shown diagrammatically in Figure 16 wherein the switchboard panel is indicated by the outline 23. A three phase power line 106 for the motor circuit leads to a fuse block 107 and thence one wire leads to a foot switch 109 and to the limit switches 93 and the stop and reverse contacts 94 and 95. and to a transformer switch 110 which controls a single phase power line 111 for the transformer circuit. The transformer circuit includes an induction regulator 112 adjusted by the handle L13, as shown in Figures 1 and 2, the primary 114 of the induction regulator being connected across the transformer lines 111 while the secondary 115 of the regulator is in series with the tapped primary 116 of the transformer 103 across the same pair of lines. The taps 117 of the transformer primary lead to separate contacts 118, a tap switch 119 being used to selectively bridge across to a bus bar 120 which is connected to the transformer switch 110.

Two of the three wires 106 of the motor circuit lead through a forward motor switch 121 and through a reverse motor switch 122, tothe forward and reverse windings of a motor 63, while the third wire is connected to both. The two motor switches are operated by forward and reverse pilot relay switches marked 123 and 124, respectively, the lower contact of forward relay 123 being bridged by a circuit through a magnetic time delay relay 125 operated by the closure of the transformer control circuit to delay and start the forward movement of the carriage while and when the transformer circuit has had time to heat the work to the required plastic state for the upsetting operation. The stop contact 94 pulls in the forward pilot relay 123 and thus opens the lower contact and hence the motor switch to stop the carriage at the end of its return motion.

The magnetic time delay relay 125 is shown in more detail in Figures 1'1 and 18, the coil 126 being the closed or lag coil while a swinging core 127 having a contact arm 12% is operated therein by a pivoted lever 128 linked at 129 to a bell crank 130 which is operated by a core 131 in a solenoid 132 which is across the transformer control circuit.

The operation of this device is as follows:

With the carriage 32 in its retracted or right hand position a rod 51, of a length suflicient to provide stock for the head to be formed thereon, is inserted between the jaws 50 of the two part or clamping electrode. These jaws are, of course, replaceable to provide for varying diameters of rod. With the rod in contact with the central rod 57 of the movable electrode 36, which is at the right hand extreme of its travel, the operator closes the foot switch 109 which operation first closes the motor circuit and moves the work to the left since the motor 63 operates the screw 62 to advance the carriage 32 and pushes the drill rod through the jaws 50. The initial movement of the rod moves the electrode 36 back slightly against the pressure of the spring backed plungers in the studs 44, a cam on the member 35 opening the switch 94 and temporarily deenergizing the motor circuit. At the time the transformer circuit is closed a heating current is induced in the secondary thereof to heat the piece to be upset. At the same time the coils 132 and 126 of the time delay relay are energized and the member 127 moves slowly and intermittently to move an attached contact arm 12711 thereon to close contacts 127a and again energize the motor circuit whereby the work is again moved to the left and the upsetting operation completed.

The solenoid 92 is connected to the common motor terminal for both directions of rotation and is disengaged when the motor circuit is open; the brake on the motor being engaged by the spring 81 and disengaged by the solenoid when the motor circuit is closed. The brake then prevents overrunning of the motor after the circuit is opened.

This further advance of the carriage causes the boss 9'7 to contact the stop 99 on the rod 96, thus pulling the rod along and opening the reversing switch contact 95 which actuates the reversing motor switch 122 through the pilot relay 124, thus returning the carriage to its starting point where the rod 96 is again shifted to operate the contact 95 which restores the electrical system to its initial starting condition.

It will thus be seen that I have provided an improved automatically controlled device for electrically upsetting the stock for valve heads and the like in a single continuous operation, wherein the operator places the stock in the machine and closes a switch, the machine operating automatically to upset the desired head on the rod as it is fed through the jaws. The machine is self-regulating in that if the rod is fed too fast or before it reaches the proper temperature, the feed is automatically slowed down or stopped.

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I, therefore, do not purpose limiting the patent granted hereon, otherwise than necessitated by the prior art.

I claim as my invention:

1. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, and means actuated by the movement of the die carriage for controlling said feeding means.

2, In a device of the class described, an'upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, and means actuated by said feeding means to hold said die carriage retracted at the end of the feeding operation.

3. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by the movement of the die carriage for controlling said feeding means, and means actuated by said feeding means to hold said die carriage retracted at the end of the feeding operation.

4. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, and limit means actuated by said feeding means adapted to reverse the feeding means and return it to its initial position.

5. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, limit means actuated by said feeding means adapted to reverse the feeding means and return it to its initial position, and means actuated by said feeding means to hold said die carriage retracted at the end of the feeding operation.

6. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by the movement of the die carriage for controlling said feeding means, and limit means actuated by said feeding means adapted to reverse the feeding means and return it to its initial position.

'1. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by the movement of the die carriage for controlling said feeding means, limit means actuated by said feeding means adapted to reverse the feeding means and return it to its initial position, and means actuated by said feeding means to hold said die carriage retracted at the end of the feeding operation.

8. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp. and means actuated by the movement of the die carriage for controlling said feeding means.

9. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by the movement of the die carriage for controlling said feeding means, and limit means actuated by said feeding means adapted to reverse the feeding means and return it to its initial position.

10. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by the movement of the die carriage for controlling said feeding means, a brake for said driving motor, a solenoid in the motor circuit adapted to release said brake and switch contacts operated by the movement of said -die carriage for stopping said motor.

11. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by the movement of the die carriage for controlling said feeding means, braking means for said driving motor, and means associated with said die carriage for reversing said motor.

12. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a, rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by the movement of the die carriage for controlling said feeding means, a solenoid operated brake for said driving motor, switch contacts operated by the movement of said die carriage for stopping said motor, and limit means actuated by said feeding means adapted to reverse the feeding means and return it to its initial position.

13. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement. an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by the movement of the die carriage for controlling said feeding means, braking means for said driving motor, means associated with said die carriage for stopping said motor, and limit means actuated by said feeding means adapted to reverse the feeding means and return it to its initial position.

14. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, forward and reverse switches for said motor adapted to be actuated by the feeding means, and operating relays therefor including a time delay relay for said forward switch included in the transformer circuit.

15. In a device of the class described. an upsetting die, a. yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, forward and reverse switches for said motor adapted to be actuated by the feeding means, operating relays therefor including a time delay relay for said forward switch included in the transformer circuit, a brake for said driving motor, a solenoid in the motor circuit adapted to release said brake, and switch contacts operated by the movement of said die carriage for stopping said motor.

16. In a device of the class described, an upsetting die, a, yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, forward and reverse switches for said motor, operating relays therefor including a time delay relay for said forward switch included in the transformer circuit, braking means for said driving motor, and means associated with said die carriage for stopping said motor.

17. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, forward and reverse switches for said motor adapted to be actuated by the feeding means, operating relays therefor including a time delay relay for said forward switch included in the transformer circuit, a brake for said driving motor, a solenoid in the motor circuit connected to said brake for releasing the same, switch contacts operated by the movement of said die carriage for stoppin said motor.

18. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by the movement of the die carriage for controlling said feeding means, and a time delay relay energized by the transformer circuit and controlling the start of the feeding means.

19. In a device of the class described, an upsetting die, a yieldinglymounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by the movement of the die carriage for controlling said feeding means, a time delay relay energized by the transformer circuit and controlling the start of the feeding means, a brake for said driving motor, a solenoid in the motor circuit connected to said brake for releasing the same and switch contacts operated by the movement of said die carriage for stopping said motor.

20. In a device of the class described, an upsetting die, a yleldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a fed to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die. a transformer having its terminals connected to said die and said .clamp, means actuated by the movement of the die carriage for controlling said feeding means, a time delay relay energized by the transformer circuit and controlling the start of the feeding means, braking means for said driving motor, and means associated with said die carriage for stopping said motor.

21. In a device of the class described, an upsetting die, a yleldingly mounted carriage therefor having a limited range of movement, an

electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by the movement of the die carriage for controlling said feeding means, a time delay relay energized by the transformer circuit and controlling the start of the feeding means, a brake for said driving motor, a solenoid in the motor circuit connected to said brake for releasingthe same, switch contacts operated by the movement of said die carriage for stopping said motor.

22. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, a time delay relay connected in said transformer circuit for operating said forward motor switch a predetermined interval after the transformer circuit is energized, a switch contact closed by the feeding means for operating the reverse switch, a brake on said feeding means, solenoid releasing means therefor connected in the motor circuit, and a switch contact opened by the backward movement of said movable die holder for stopping said motor.

23. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, a time delay relay connected in said transformer circuit for operating said forward motor switch a predetermined interval after the transformer circuit is energized, a brake on said feeding means, solenoid releasing means therefor connected in the motor circuit, and a switch contact opened by the backward movement of said movable die holder for stopping said motor.

24. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, a time delay relay connected in said transformer circuit for operating said forward motor switch a predetermined interval after the transformer circuit is energized, and a switch contact closed by the feeding means for operating the reverse switch.

25. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, and a time delay relay connected in said transformer circuit for operating said forward motor switch a predetermined interval after the transformer circuit is energized.

26. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, a time delay relay connected in said transformer circuit for operating said forward motor switch a predetermined interval after the transformer circuit is energized, a switch contact closed by the feeding means for operating the reverse switch, braking means to prevent overrunning of said driving motor, and means adapted to stop the feeding means when the movable die holder is pushed backwards by the rod being operated upon.

27. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, a time delay relay connected in said transformer circuit for operating said forward motor switch a predetermined interval after the transformer circuit is energized, braking means to prevent overrunning of said driving motor, and means adapted to stop the feeding means when the movable die holder is pushed backwards by the rod being operated upon.

28. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, pilot relays for said motor switches, and a time delay relay connected in said transformer circuit for energizing the pilot relay for said forward motor switch adapted to be actuated by the movement of the feeding means.

29. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, pilot relays for said motor switches, a time delay relay connected in said transformer circuit for energizing the pilot relay for said forward motor switch, and a switch contact closed by the normal operation of the feeding means for energizing the pilot relay for said reverse motor switch.

30. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, pilot relays for actuating said motor switches, a time delay relay connected in said transformer circuit for energizing the pilot relay for said for ward motor switch, braking means to prevent overrunning of said driving motor, and means adapted to stop the feeding means when the movable die holder is pushed backwards by the rod being operated upon.

31. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, pilot relays for actuating said motor switches, a time delay relay connected in said transformer circuit for energizing the pilot relay for said forward motor switch, a switch contact closed by the normal operation of the feeding means for energizing the pilot relay for said reverse motor switch, braking means to prevent overrunning of said driving motor, and means adapted to stop the feeding means when the movable die holder is pushed backwards by the rod being operated upon.

32. In a device of the class described, an upsetting die, a yieldingly mounted carriage there for having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by the movement of the rod for controlling said feeding means, braking means to prevent overrunning of said driving motor, and means adapted to interrupt the feed when the movable die holder is pushed backwards by the rod being operated upon.

33. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by said feeding means to hold said die carriage retracted at the end of the feeding operation, braking means to prevent overrunning of said driving motor, and means adapted to interrupt the feed when the movable die holder is pushed backwards by the rod being operated upon.

34. In a device of the class described, an upsetting die, a yieldingly mounted carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, a transformer having its terminals connected to said die and said clamp, means actuated by the movement of the rod for controlling said feeding means, means actuated by said feeding means to hold said die carriage retracted at the end of the feeding operation, braking means to prevent overrunning of said driving motor, and means adapted to interrupt the feed when the movable die holder is pushed backwards by the rod being operated upon.

35. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, a time delay relay connected in said transformer circuit for operating said forward motor switch a predetermined interval after the transformer circuit is energized, and means in the transformer primary circuit for varying the voltage and resistance thereof.

36. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, a time delay relay connected in said transformer circuit for operating said forward motor switch a predetermined interval after the transformer circuit is energized, a. switch contact closed by the feeding means for operating the reverse switch, braking means to prevent overrunning of said driving motor, means adapted to interrupt the feed when the movable die holder is pushed backwards by the rod being operated upon, and means in the transformer primary circuit for varying the voltage and resistance thereof.

37. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, pilot relays for said motor switches, a switch operated by the feeding means for energizing the reverse switch pilot relay, a time delay relay connected in said transformer circuit for energizing the pilot relay for said forward motor switch, and means in the transformer primary circuit for varying the voltage and resistance thereof.

38. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, forward and reverse motor switches, a solenoid operated brake to prevent overrunning of said driving motor, and switch contacts operated by the movement of said rod for energizing said motor switches.

39. A device of the class described comprising a movable die holder, a clamp for the rod to be upset, feeding means including a driving motor for feeding said rod through the clamp against the die, a transformer connected to the die and clamp, braking means for said driving motor, and means associated with said die carriage for interrupting the feeding means.

40. In a device of the class described, a transformer, a movable die electrode and a clamping electrode electrically connected thereto, means for varying the voltage and resistance of the transformer voltage, means for feeding materail through said clamping electrode against said die electrode, a brake on said feeding means adapted to prevent overrunning thereof, means adapted to automatically return said feeding means to its starting point at the end of its feeding stroke, and means adapted to start said feeding means a predetermined time after the transformer circuit is closed.

41. In a device of the class described, a transformer, a movable die electrode and a clamping electrode electrically connected thereto, means for varying the voltage and resistance of the transformer voltage, means for feeding material through said clamping electrode against said die electrode, means adapted to automatically return said feeding means to its starting point at the end of its feeding stroke, and means adapted to start said feeding means a predetermined time after the transformer circuit is closed.

42. In a device of the class described, a transformer, a movable die electrode and a clamping electrode electrically connected thereto, means for varying the voltage and resistance of the transformer voltage, means for feeding material through said clamping electrode against said die electrode, a brake on said feeding means adapted to prevent overrunning thereof, and means adapted to start said feeding means a predetermined time after the transformer circuit is closed.

43. In a device of the class described, a transformer, a movable die electrode and a clamping electrode electrically connected thereto, means for varying the voltage and resistance of the transformer voltage, means for feeding material through said clamping electrode against said die electrode, a brake on said feeding means adapted to prevent overrunning thereof, and means adapted to automatically return said feeding means to its starting point at the end of its feeding stroke.

44. In a device of the class described, a transformer, a movable die electrode and a clamping electrode electrically connected thereto, means for varying the voltage and resistance of the transformer voltage, means for feeding material through said clamping electrode against said die electrode, and means adapted to start said feeding means a predetermined time after the transformer circuit is closed.

45. In a device of the class described, a trans- 10 former, a movable die electrode and a clamping electrode electrically connected thereto, means for varying the voltage and resistance of the transformer voltage, means for feeding material through said clamping electrode against said die electrode, and means actuated by the feeding means adapted to automatically return said feeding means to its starting point at the end of its feeding stroke.

46. In a device of the class described. a transformer, a movable die electrode and a clamping electrode electrically connected thereto, means for varying the voltage and resistance of the transformer voltage, means for feeding material through said clamping electrode against said die electrode, and a brake on said feeding means adapted to prevent overrunning thereof.

47. In a device of the class described, an upsetting die, a carriage therefor, a heat insulating material positioned between said die and carriage, an electrode clamp adapted to permit a rod to be fed therethrough and means for feeding said rod through said clamp into contact with said upsetting die.

48. In a device of the class described, an up setting die, a carriage therefor, a pilot rod mounted in said carriage and extending through the axis of said die, a heat insulating material positioned between said die and carriage, an electrode clamp adapted to permit a rod to be fed therethrough and means for feeding said rod through said clamp into contact with said upsetting die.

49. In a device of the class described, an up setting die, a carriage therefor, a heat insulating material positioned between said die and carriage, an electrode clamp adapted to permit a rod to be fed therethrough and means adapted to feed said rod through said clamp.

50. In a device of the class described, an upsetting die, a carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp to contact with said die, and means actuated by the movement of the die carriage to control movement of said feeding means.

51. In a device of the class described, an upsetting die, a carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp to con-- tact with said die, and means actuated by said feeding means to hold said die carriage retracted at the end of the feeding operation.

52. In a device of the class described, an upsetting die, a carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough. means for feeding said rod through said clamp into contact with said die means actuated by the movement of the die carriage to control movement of said feeding means, and means actuated by said feeding means to hold said carriage retracted at the end of the feeding operation.

53. In a device of the class described, an upsetting die, a carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, and limit means actuated by said feeding means adapted to reverse the feeding means and return it to its initial position.

54. In a device of the class described, an upsetting die, a carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, limit means actuated by said feed ng means adapted to reverse the feeding means and return it to its initial position, and means actuated by said feeding means to hold said die carriage retracted at the end of the feeding operation.

55. In a device of the class described, an upsetting die, a carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, means actuated by the movement of the die carriage to control movement of said feeding means, and limit means actuated by said feeding means adapted to reverse the feeding means and return it to its initial position.

56. In a device of the class described, an upsetting die, a carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means for feeding said rod through said clamp into contact with said die, means actuated by the movement of the die carriage to control movement of said feeding means, limit means ac'tuated by said feeding means adapted to reverse the feeding means and return it to its initial position, and means actuated by said feeding means to hold said die carriage retracted at the end of the feeding operation.

5'1. In a device of the class described, an upsetting die, a carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die and means actuated by the movement of the die carriage to control movement of said feeding means.

58. In a device of the class described, an upsetting die, a carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, means actuated by the movement of the die carriage to control movement of said feeding means, and limit means actuated by said feeding means adapted to reverse the feeding means and return it to its initial position.

59. In a device of the class described, an upsetting die, a carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, means actuated by said movement of the die carriage to control movement of said feeding means, a brake for said driving motor, a solenoid in the motor circuit adapted to release said brake and a switch contact operated by the movement of said die carriage for stopping said motor.

60. In a device of the class described, an upsetting die, a carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, means actuated by the movement of the die carriage to control movement of said feeding means, braking means for said driving motor and means associated with said die carriage for reversing said motor.

61. In a device of the class described, an upsetting die, a carriage therefor having a limited range of movement, an electrode clamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact withsaid die, means actuated by the movement of the die carriage to control movement of said feeding means, a solenoid operated brake for said driving motor, switch contacts operated by the movement of said die carriage for stopping said motor and limit means actuated by said feeding means adapted to reverse the feeding means and return it to its initial position.

62. In a device of the class described, an upsetting die, a carriage therefor having a limited range of movement, an electrodeclamp adapted to permit a rod to be fed therethrough, means including a reversing driving motor for feeding said rod through said clamp into contact with said die, means actuated by the movement ofthe die carriage to control movement of said feeding means, braking means for said driving motor, means associated with said die carriage for stopping said motor and limit means actuated by said feeding means adapted to reverse the feeding means and return it to its initial position.

63. In apparatus for electrically upsetting stock, the combination of a guiding electrode for sliding contact with the stock, an electrode serving as an abutment for one end of said stock, means for advancing said stock in the direction of the abutment, means movable synchronized with the movement of the stock advancing means for moving the abutment in the direction in which the stock advances, and means to retain saidabutment in fixed position during the upsetting operation.

64. In apparatus for electrically upsetting stock, the combination of a guiding electrode for sliding contact with the stock, a movable electrode arranged to serve as an abutment for one end of the stock, pressure means arranged to yieldingly retain said abutment in one position during the upsetting operation, means for pushing the stock through the guiding electrode towards the abutment electrode, and means including said stock-pushing means arranged to move said abutment electrode to another position and thereby increase the distance between the electrodes.

65. In apparatus for upsetting stock, the combination of a guiding electrode for sliding contact with the stock, power means to advance the stock through said guiding electrode, an abutment electrode engageable by the stock and adapted for forward movement thereby, means connected yieldingly opposing forward movement of said abutment electrode, means to limit forward movement of said abutment electrode, and a heating current circuit connected to said abutment electrode and to said guiding electrode.

WILLIAM H. SPIRE.

CERTIFICATE OF CORRECTION.

Patent No. 1,985,803. December 25, 1934.

WILLIAM H. SPIRE.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 6, first column, lines 31 and 32, claim 28, strike out the words "adapted to be actuated by the movement of the feeding means" and insert the same after "switches" in line 28, of said claim; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 19th day of February, A. D. 1935.

Leslie Frazer (Seal) Acting Commissioner of Patents. 

